1 #ifndef HW_ISA_H 2 #define HW_ISA_H 3 4 /* ISA bus */ 5 6 #include "exec/ioport.h" 7 #include "exec/memory.h" 8 #include "hw/qdev.h" 9 10 #define ISA_NUM_IRQS 16 11 12 #define TYPE_ISA_DEVICE "isa-device" 13 #define ISA_DEVICE(obj) \ 14 OBJECT_CHECK(ISADevice, (obj), TYPE_ISA_DEVICE) 15 #define ISA_DEVICE_CLASS(klass) \ 16 OBJECT_CLASS_CHECK(ISADeviceClass, (klass), TYPE_ISA_DEVICE) 17 #define ISA_DEVICE_GET_CLASS(obj) \ 18 OBJECT_GET_CLASS(ISADeviceClass, (obj), TYPE_ISA_DEVICE) 19 20 #define TYPE_ISA_BUS "ISA" 21 #define ISA_BUS(obj) OBJECT_CHECK(ISABus, (obj), TYPE_ISA_BUS) 22 23 #define TYPE_APPLE_SMC "isa-applesmc" 24 25 static inline bool applesmc_find(void) 26 { 27 return object_resolve_path_type("", TYPE_APPLE_SMC, NULL); 28 } 29 30 typedef struct ISADeviceClass { 31 DeviceClass parent_class; 32 } ISADeviceClass; 33 34 struct ISABus { 35 /*< private >*/ 36 BusState parent_obj; 37 /*< public >*/ 38 39 MemoryRegion *address_space_io; 40 qemu_irq *irqs; 41 }; 42 43 struct ISADevice { 44 /*< private >*/ 45 DeviceState parent_obj; 46 /*< public >*/ 47 48 uint32_t isairq[2]; 49 int nirqs; 50 int ioport_id; 51 }; 52 53 ISABus *isa_bus_new(DeviceState *dev, MemoryRegion *address_space_io); 54 void isa_bus_irqs(ISABus *bus, qemu_irq *irqs); 55 qemu_irq isa_get_irq(ISADevice *dev, int isairq); 56 void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq); 57 MemoryRegion *isa_address_space(ISADevice *dev); 58 MemoryRegion *isa_address_space_io(ISADevice *dev); 59 ISADevice *isa_create(ISABus *bus, const char *name); 60 ISADevice *isa_try_create(ISABus *bus, const char *name); 61 ISADevice *isa_create_simple(ISABus *bus, const char *name); 62 63 ISADevice *isa_vga_init(ISABus *bus); 64 65 /** 66 * isa_register_ioport: Install an I/O port region on the ISA bus. 67 * 68 * Register an I/O port region via memory_region_add_subregion 69 * inside the ISA I/O address space. 70 * 71 * @dev: the ISADevice against which these are registered; may be NULL. 72 * @io: the #MemoryRegion being registered. 73 * @start: the base I/O port. 74 */ 75 void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start); 76 77 /** 78 * isa_register_portio_list: Initialize a set of ISA io ports 79 * 80 * Several ISA devices have many dis-joint I/O ports. Worse, these I/O 81 * ports can be interleaved with I/O ports from other devices. This 82 * function makes it easy to create multiple MemoryRegions for a single 83 * device and use the legacy portio routines. 84 * 85 * @dev: the ISADevice against which these are registered; may be NULL. 86 * @start: the base I/O port against which the portio->offset is applied. 87 * @portio: the ports, sorted by offset. 88 * @opaque: passed into the portio callbacks. 89 * @name: passed into memory_region_init_io. 90 */ 91 void isa_register_portio_list(ISADevice *dev, uint16_t start, 92 const MemoryRegionPortio *portio, 93 void *opaque, const char *name); 94 95 static inline ISABus *isa_bus_from_device(ISADevice *d) 96 { 97 return ISA_BUS(qdev_get_parent_bus(DEVICE(d))); 98 } 99 100 extern hwaddr isa_mem_base; 101 102 /* dma.c */ 103 int DMA_get_channel_mode (int nchan); 104 int DMA_read_memory (int nchan, void *buf, int pos, int size); 105 int DMA_write_memory (int nchan, void *buf, int pos, int size); 106 void DMA_hold_DREQ (int nchan); 107 void DMA_release_DREQ (int nchan); 108 void DMA_schedule(int nchan); 109 void DMA_init(int high_page_enable, qemu_irq *cpu_request_exit); 110 void DMA_register_channel (int nchan, 111 DMA_transfer_handler transfer_handler, 112 void *opaque); 113 #endif 114